MADRID, Spain (CNN) -- Spain has again seized an American treasure-hunting ship over a dispute with its owners over who has rights to millions of dollars worth of booty recovered from the sea, officials said. Spain seized the "Odyssey Explorer" -- owned by Odyssey Marine Exploration based Tampa, Florida -- as it sailed out of port in the British colony of Gibraltar on Tuesday. Armed Spanish government vessels were waiting for the Explorer when it reached 6.4 kilometers (4 miles) off Gibraltar's shore and entered what Spain considers its territorial waters. The vessels forced the Explorer to dock at Spain's...